Important: kernel security and bug fix update

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.4 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• KVM: cmpxchg_gpte can write to pfns outside the userspace region (CVE-2022-1158)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• E810-XXV - Multicast packets are not received by all VFs on the same port even though they have the same VLAN (BZ#2117027)
• kernel BUG at kernel/sched/deadline.c:1561! [rhel-8.4.0] (BZ#2125673)
• zfcp: fix missing auto port scan and thus missing target ports (BZ#2127851)
• memory leak in vxlan_xmit_one (BZ#2131256)
• nf_conntrack causing nfs to stall (BZ#2134090)
• s390x: bpftrace Could not read symbols from /sys/kernel/debug/tracing/available_filter_functions: No such device (BZ#2134809)
• Intel E810 PTP clock glitching (BZ#2136038)
• configure link-down-on-close on and change interface mtu to 9000,the interface can't up (BZ#2136218)
• dump additional CSRs for Tx hang debugging (BZ#2136515)
• system panic during sriov sriov_test_cntvf_reboot testing (BZ#2137272)
• arp replies not making it to switch (BZ#2137521)
• WARNING: CPU: 0 PID: 9637 at kernel/time/hrtimer.c:1309 hrtimer_start_range_ns+0x35d/0x400 (BZ#2138956)
• Cannot trigger kernel dump using NMI on SNO node running PAO and RT kernel (BZ#2139582)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.4 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.4 ppc64le
• Red Hat Enterprise Linux Server - TUS 8.4 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.4 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.4 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.4 x86_64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.4 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.4 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.4 aarch64

Fixes

• BZ - 2069793 - CVE-2022-1158 kernel: KVM: cmpxchg_gpte can write to pfns outside the userspace region

CVEs

• CVE-2022-1158

References

• https://access.redhat.com/security/updates/classification/#important